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  2. List of ecoregions in the United States (EPA) - Wikipedia

    en.wikipedia.org/wiki/List_of_ecoregions_in_the...

    The Commission's 1997 report, Ecological Regions of North America, provides a framework that may be used by government agencies, non-governmental organizations, and academic researchers as a basis for risk analysis, resource management, and environmental study of the continent's ecosystems. [1]

  3. Ecological classification - Wikipedia

    en.wikipedia.org/wiki/Ecological_classification

    Ecological classification or ecological typology is the classification of land or water into geographical units that represent variation in one or more ecological features. . Traditional approaches focus on geology, topography, biogeography, soils, vegetation, climate conditions, living species, habitats, water resources, and sometimes also anthropic factors.

  4. List of ecoregions in North America (CEC) - Wikipedia

    en.wikipedia.org/wiki/List_of_ecoregions_in...

    Oases form in all four deserts when the groundwater reaches the surface and pools in the hollows of the desert basins. [10] Being surrounded by mountains provides a rain shadow effect that contributes to the dry climate and creates the desert ecosystem. [11] All four deserts experience times of drought and times of intense precipitation. [12]

  5. Ecosystem - Wikipedia

    en.wikipedia.org/wiki/Ecosystem

    [3] [4]: 5 [2]: 458 The biotic and abiotic components are linked together through nutrient cycles and energy flows. [5] "Ecosystem processes" are the transfers of energy and materials from one pool to another. [2]: 458 Ecosystem processes are known to "take place at a wide range of scales". Therefore, the correct scale of study depends on the ...

  6. Ecozones of Canada - Wikipedia

    en.wikipedia.org/wiki/Ecozones_of_Canada

    The new spatial framework was designed to replace the 1995 ecological framework as well as the Ecozone+ framework used in the Canadian Biodiversity: Ecosystem Status and Trends 2010 Report. This new ecozone map includes 18 terrestrial, 12 marine and 1 freshwater ecozone, the latter two of which were derived from the marine bioregions outlined ...

  7. Ecological pyramid - Wikipedia

    en.wikipedia.org/wiki/Ecological_pyramid

    The pyramid of energy represents how much energy, initially from the sun, is retained or stored in the form of new biomass at each trophic level in an ecosystem. Typically, about 10% of the energy is transferred from one trophic level to the next, thus preventing a large number of trophic levels.

  8. Marine ecosystem - Wikipedia

    en.wikipedia.org/wiki/Marine_ecosystem

    Actual salinity varies among different marine ecosystems. [4] Marine ecosystems can be divided into many zones depending upon water depth and shoreline features. The oceanic zone is the vast open part of the ocean where animals such as whales, sharks, and tuna live. The benthic zone consists of substrates below water where many invertebrates live.

  9. Glossary of ecology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_ecology

    Also Gause's law. A biological rule which states that two species cannot coexist in the same environment if they are competing for exactly the same resource, often memorably summarized as "complete competitors cannot coexist". coniferous forest One of the primary terrestrial biomes, culminating in the taiga. conservation biology The study of Earth's biodiversity with the aim of protecting and ...

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